The battery itself may be the problem. Remove the battery from the camera and insert it into the charger. If the light on the charger is red, the battery does not have a charge. Leave the battery in the charger until a green light is displayed, indicating the battery is fully charged. If the light does not transition from red to green, replace the old battery with a new one. If the charger indicates a charged battery and the camera still does not turn on, check the wiring or replace the battery.